PREPARATION AND CHARACTERIZATION OF BENTONITE CLAY CATALYSTS FOR TRANSESTERIFICATION OF WASTE COOKING OIL INTO BIODIESEL

  • Faruk Usman
  • Muhammad Alkali
Keywords: Bentonite, Pillared clay, Biodiesel, Waste cooking oil, NaOH/Bentonite

Abstract

The development of low-cost green catalytic materials is crucial for the conversion of non-edible vegetable oils or waste materials into biodiesel. The research focuses on the preparation and characterization of aluminium pillared clay and NaOH-doped bentonite clay catalysts for biodiesel production from waste cooking oil using XRF, XRD, FTIR and N2 adsorption-desorption techniques. The molecular profile and functional group assessment of the biodiesel were done using GC-MS and FTIR respectively. XRF analysis revealed the presence of oxides in all samples. The amount of SiO2 in all samples was within the range of 35.303–39.199 wt%. Al2O3 increased from 15.560 to 19.11 wt%, while the interlayer cations decreased after pillaring. FTIR revealed the appearance of peaks which are characteristic of bentonite. The pillaring and impregnation of NaOH with bentonite led to a distortion of certain peaks' intensity, as evidenced by FTIR results. The pillaring caused an increase in BET surface area and pore volume compared to bentonite from 302.1 to 366.4 m2/g, and 0.186 to 0.189 cc/g respectively, while a decrease in surface area and pore volume was observed in NaOH/bentonite due to impregnation. The XRD data have shown the increase of basal d-spacing of pillared clay from 12.65 to 16.49 Å relative to bentonite with a decrease to 12.45 in the case of NaOH/bentonite. The catalysts prepared outperformed neat bentonite with NaOH/bentonite, resulting in the highest yield of (83 ± 1.80). GC-MS, FTIR, and physicochemical analyses confirmed the production of fatty acid methyl esters.

References

Abdul Raqeeb M. and Bhargavi R. (2015). Biodiesel production from waste cooking oil. Journal of Chemical and Pharmaceutical Research, 7(12):670-681

Baloyi, J., Ntho, T. and Moma, J. (2019). Synthesis of highly active and stable Al/Zr pillared clay as catalyst for catalytic wet oxidation of phenol. Journal of Porous Materials, 26(2), 583–597. https://doi.org/10.1007/s10934-018-0667-3 DOI: https://doi.org/10.1007/s10934-018-0667-3

Banerjee N. and Ritica R. and Tushar J. (2014). Biodiesel Production from Used Vegetable Oil Collected from Shops Selling Fritters in Kolkata. Energy Procedia, 54, 161 – 165. DOI: https://doi.org/10.1016/j.egypro.2014.07.259

Borugadda V.B. and Goud V.V. (2012). Biodiesel production from renewable feedstocks: Status and opportunities. Renew Sust Energ Rev. 16:4763–4784. DOI: https://doi.org/10.1016/j.rser.2012.04.010

Collin, S. M. A., Wan, G. J., Ashri, M., and Wan, B. (2015). Preparation and characterization of activated carbon from Typha orientalis leaves. International Journal of Industrial Chemistry 6(1):9-21. https://doi.org/10.1007/s40090-014-0027-3 DOI: https://doi.org/10.1007/s40090-014-0027-3

Published
2024-04-30
How to Cite
UsmanF., & AlkaliM. (2024). PREPARATION AND CHARACTERIZATION OF BENTONITE CLAY CATALYSTS FOR TRANSESTERIFICATION OF WASTE COOKING OIL INTO BIODIESEL. FUDMA JOURNAL OF SCIENCES, 8(2), 204 - 211. https://doi.org/10.33003/fjs-2024-0802-2347